Stainless precipitation hardened steel 17-4PH, 17-4 PH, 1.4542, X5CrNiCuNb17-4-4, AISI 630, UNS S17400 according to EN 10088-1, ASTM A564.
| Standards | Steel Grades | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | Nb: | Cu: | N: | |
| ASTM | 17-4 PH - 17-4PH - UNS S17400 - AISI 630 | ||||||||||
| <0.07 | <1.0 | <1.0 | <0.04 | <0.03 | 15.0 - 17.5 | 3.0 - 5.0 | - | 0.15 - 0.45 | 3.0 - 5.0 | - | |
| EN | X5CrNiCuNb16-4 - X 5 CrNiCuNb 16-4 - 1.4542 | ||||||||||
| <0.07 | <1.5 | <0.7 | <0.04 | <0.03 | 15.0 - 17.0 | 3.0 - 5.0 | <0.6 | <0.45 | 3.0 - 5.0 | - | |
| LW | X5CrNiCuNb17-4-4 - X 5 CrNiCuNb 17-4-4 - 1.4548 | ||||||||||
| <0.07 | <1.0 | <1.0 | <0.025 | <0.025 | 15.0 - 17.5 | 3.0 - 5.0 | - | 0.15 - 0.45 | 3.0 - 5.0 | - | |
| DIN | X4CrNiCuNb16-4 - X 4 CrNiCuNb 16 4 - 1.4540 | ||||||||||
| <0.06 | <1.0 | <1.0 | - | - | 15.0 - 17.0 | 3.5 - 5.0 | - | 0.15 - 0.40 | 2.5 - 4.0 | <0.05 | |
| AF | Z7CNU17-04 - Z 7 CNU 17-04 - 17-4 DP - X17U4 | ||||||||||
| <0.07 | <1.0 | <0.75 | <0.04 | <0.015 | 15.5 - 17.5 | 4.0 - 5.0 | - | 0.15 - 0.45 | 3.0 - 5.0 | - | |
| AF | Z7CNU16-04 - Z 7 CNU 16-04 - 174 PH | ||||||||||
| <0.07 | <1.0 | <0.75 | <0.035 | <0.025 | 15.0 - 17.5 | 3.0 - 5.0 | <0.5 | 0.15 - 0.45 | 3.0 - 5.0 | - | |
| GOST | 05Ch16N4D2B - 05Х16Н4Д2Б | ||||||||||
| <0.07 | <1.8 | <0.8 | <0.03 | <0.03 | 15.0 - 17.5 | 2.0 - 5.0 | - | 0.05 - 0.5 | 1.5 - 3.0 | - | |
| GOST | 07Ch16N4D4B-Sh - 07Х16Н4Д4Б-Ш - 07Ch14N4DB - 07Х14Н4ДБ | ||||||||||
| <0.7 | <1.0 | <1.0 | <0.045 | <0.03 | 15.0 - 17.0 | 3.0 - 5.0 | <0.3 | <0.45 | 3.0 - 5.0 | - | |
17-4PH, X5CrNiCuNb16-4, 1.4542, X5CrNiCuNb17-4-4, 1.4548 - specification and application
17-4PH is one of the most popular and most commonly used stainless chromium-nickel alloy steels with copper additive, precipitation hardened with martensitic structure. It is characterized by high corrosion resistance while maintaining high strength properties, including hardness.
Steel can operate in the temperature range from -29 ℃ to 343 ℃, while retaining relatively good parameters. In addition, the materials in this grade are characterized by relatively good ductility and their corrosion resistance is comparable to 1.4301 / X5CrNi18-10.
Bearing in mind that it is a precipitation hardened steel, it should be applied after supersaturation and aging. In the delivery condition +A, the products show no martensitic structure, resulting in significantly less corrosion resistance.
Steel can be welded by TIG, but the welding process requires the use of an annealed material. Otherwise the material at the joints will not retain the proper structure. Furthermore, at the expense of a slight loss of corrosion resistance, the products can be nitrided to achieve a hardened topcoat.
17-4PH, and X5CrNiCuNb16-4 / 1.4542 is provided, among others, in the form of round bars, sheets, flat bars and cold-rolled tapes.
The material is widely used in the aerospace, marine, paper, energy, offshore and food industries for heavy-duty machine components, bushings, turbine blades, couplings, screws, drive shafts, nuts, measuring devices.
Mechanical properties of 17-4PH / AISI 630 / UNS S17400 according to ASTM A564:
- Delivery condition +A:
- HRC Hardness: <38
- HB Hardness: <363
- Delivery condition H900
- Tensile strength, Rm: >1310 MPa
- Yield point, Rp0,2: >1170 MPa
- Elongation, A: >10%
- Contraction, Z: >40%
- HB Hardness: >388
- HRC Hardness: >40
- Delivery condition H925
- Tensile strength, Rm: >1170 MPa
- Yield point, Rp0,2: >1070 MPa
- Elongation, A: >10%
- Przewężenie, Z: >44%
- HB Hardness: >375
- HRC Hardness: >38
- Impact resistance, KV21℃: >6.8 J
- Delivery condition H1025
- Tensile strength, Rm: >1070 MPa
- Yield point, Rp0,2: >1000 MPa
- Elongation, A: >12%
- Contraction, Z: >45%
- HB Hardness: >331
- HRC Hardness: >35
- Udarność, KV21℃: >20 J
- Delivery condition H1075
- Tensile strength, Rm: >1000 MPa
- Yield point, Rp0,2: >860 MPa
- Elongation, A: >13%
- Contraction, Z: >45%
- HB Hardness: >311
- HRC Hardness: >32
- Impact resistance, KV21℃: >27 J
- Delivery condition H1100
- Tensile strength, Rm: >965 MPa
- Yield point, Rp0,2: >795 MPa
- Elongation, A: >14%
- Contraction, Z: >45%
- HB Hardness: >302
- HRC Hardness: >31
- Impact resistance, KV21℃: >34 J
- Delivery condition H1150
- Tensile strength, Rm: >930 MPa
- Yield point, Rp0,2: >725 MPa
- Elongation, A: >16%
- Contraction, Z: >50%
- HB Hardness: >277
- HRC Hardness: >28
- Impact resistance, KV21℃: >41 J
- Delivery condition H1150M
- Tensile strength, Rm: >795 MPa
- Yield point, Rp0,2: >520 MPa
- Elongation, A: >18%
- Contraction, Z: >55%
- HB Hardness: >255
- HRC Hardness: >24
- Impact resistance, KV21℃: >75 J
- Delivery condition H1150D
- Tensile strength, Rm: >860 MPa
- Yield point, Rp0,2: >725 MPa
- Elongation, A: >16%
- Contraction, Z: >50%
- HB Hardness: >255
- HRC Hardness: >24
- Impact resistance, KV21℃: >41 J
Mechanical and physical properties of 1.4542 / X5CrNiCuNb16-4 according to EN 10088:
Physical properties according to EN 10088-1:
- Heat capacity, cp20℃: 500 J * kg-1 * K-1
- Heat conductivity, λ: 16 W * m-1 * K-1
- Modulus of elasticity, E: 200 GPa
- Density: 7.8 g/cm3
- Linear Expansion Factor, α20℃: 10.9 * 10-6 K-1
Mechanical properties according to EN 10088-3 for hot-rolled and smooth bars:
- Delivery condition +AT
- Tensile strength, Rm: <1200 MPa
- Hardness, HB: <360
- Delivery condition +P800
- Tensile strength, Rm: 850 - 1100 MPa
- Yield point, Rp0,2: >520 MPa
- Elongation, A: >10%
- Impact resistance, KV20℃: >75 J
- Properties at elevated temperature in delivery condition +P800
- 100℃ - Yield point, Rp0,2: >500 MPa
- 150℃ - Yield point, Rp0,2: >490 MPa
- 200℃ - Yield point, Rp0,2: >480 MPa
- 250℃ - Yield point, Rp0,2: >470 MPa
- 300℃ - Yield point, Rp0,2: >460 MPa
- Properties at elevated temperature in delivery condition +P800
- Delivery condition +P930
- Tensile strength, Rm: 930 - 1100 MPa
- Yield point, Rp0,2: >720 MPa
- Elongation, A: >12%
- Impact resistance, KV20℃: >40 J
- Properties at elevated temperature in delivery condition +P930
- 100℃ - Yield point, Rp0,2: >680 MPa
- 150℃ - Yield point, Rp0,2: >660 MPa
- 200℃ - Yield point, Rp0,2: >640 MPa
- 250℃ - Yield point, Rp0,2: >620 MPa
- 300℃ - Yield point, Rp0,2: >600 MPa
- Properties at elevated temperature in delivery condition +P930
- Delivery condition +P960
- Tensile strength, Rm: 960 - 1160 MPa
- Yield point, Rp0,2: >790 MPa
- Elongation, A: >12%
- Properties at elevated temperature in delivery condition +P960
- 100℃ - Yield point, Rp0,2: >730 MPa
- 150℃ - Yield point, Rp0,2: >710 MPa
- 200℃ - Yield point, Rp0,2: >690 MPa
- 250℃ - Yield point, Rp0,2: >670 MPa
- 300℃ - Yield point, Rp0,2: >650 MPa
- Properties at elevated temperature in delivery condition +P960
- Delivery condition +P1070
- Tensile strength, Rm: 1070 - 1270 MPa
- Yield point, Rp0,2: >1000 MPa
- Elongation, A: >10%
- Properties at elevated temperature in delivery condition +P1070
- 100℃ - Yield point, Rp0,2: >880 MPa
- 150℃ - Yield point, Rp0,2: >830 MPa
- 200℃ - Yield point, Rp0,2: >800 MPa
- 250℃ - Yield point, Rp0,2: >770 MPa
- 300℃ - Yield point, Rp0,2: >750 MPa
- Properties at elevated temperature in delivery condition +P1070
Mechanical properties for cold-rolled tapes and hot-rolled sheets 1.4542 / X5CrNiCuNb16-4 according to EN 10088-2
- Delivery condition of cold-rolled tapes +AT
- Tensile strength, Rm: <1275 MPa
- Elongation, A: >5%
- Delivery condition of cold-rolled tapes +P1300
- Tensile strength, Rm: >1300 MPa
- Yield point, Rp0,2: >1150 MPa
- Elongation, A: >3%
- Delivery condition of cold-rolled tapes +P900
- Tensile strength, Rm: >900 MPa
- Yield point, Rp0,2: >700 MPa
- Elongation, A: >6%
- Delivery condition of hot-rolled sheets +P1070
- Tensile strength, Rm: 1070 - 1270 MPa
- Yield point, Rp0,2: >1000 MPa
- Elongation A: >8%
- Delivery condition of hot-rolled sheets +P950
- Tensile strength, Rm: 950 - 1150 MPa
- Yield point, Rp0,2: >800 MPa
- Elongation, A: >10%
- Delivery condition of hot-rolled sheets +P850
- Tensile strength, Rm: 850 - 1050 MPa
- Yield point, Rp0,2: >600 MPa
- Elongation, A: >12%
- Delivery condition of hot-rolled sheets +SR630
- Tensile strength, Rm: <1050 MPa
Heat treatment and plastic forming processes of 1.4542 / X5CrNiCuNb16-4 steel
- Forging and rolling at 1150 - 900 ℃ with cooling in the air
- Annealing at 1020 - 1055 ℃ with cooling in oil or air
- Ageing for +P800 condition at 760 ℃ in the air for 2h + 620 ℃ in the air for 4h
- Ageing for +P850 condition at 610 - 630 ℃ in the air for 4h
- Ageing for +P900 condition at 590-610 ℃ in the air for 1h
- Aging for +P930 condition at 620℃ in the air for 4h
- Ageing for +P950 condition at 580 - 600℃ in the air for 1h
- Aging for +P960 condition at 590℃ in the air for 4h
- Aging for +P1070 condition at 550℃ in the air for 4h
- Ageing for +P1300 condition at 470 - 490℃ in the air for 1h
In the above mentioned grades the company provides:
- Round bars and flat bars 17-4PH, 1.4542, X5CrNiCuNb16-4
- Forgings and forged bars 17-4PH, 1.4542, X5CrNiCuNb16-4
- Cold-rolled stripes 17-4PH, 1.4542, X5CrNiCuNb16-4
- Hot-rolled sheets 17-4PH, 1.4542, X5CrNiCuNb16-4
Other indications and equivalents of 17-4PH steel:
17-7 PH, 17-4, UNS S17400, UNS 17480, 17-4 super-x, 05Cr17Ni4Cu4Nb, 1.4540, X4CrNiCuNb16-4, X 4 CrNiCuNb 16-4, 0Cr17Ni4Cu4Nb, 1.4542, X5CrNiCuNb16-4, X 5 CrNiCuNb 16-4, Z7CNU16-04, Z 7 CNU 16-04, Z 7 CNU 17-04, Z7CNU17-04, 1.4548, X5CrNiCuNb17-4-4, X 5 CrNiCuNb 17-4-4, 4542-174-00-I, 17-4 DP, AISI 630, SUS 630, SUS630, ASTM A693 Type 630, ASTM A564 Type S17400, ASTM A705 Type 630, ASTM A1082 Type 630 S17400, 07Ch16N4D4B-Sh, 07Х16Н4Д4Б-Ш, 07Ch14N4DB, 07Х14Н4ДБ, 05Ch16N4D2B, 05Х16Н4Д2Б, AMS 5604, AMS 5622, AMS 5643, AMS 5803, AMS 5825.